SORRY: This got published before it was finished:
I'll share one of my old stand-by finger-picking pattern. Start out slowly, then the more you practce it the soner you can speed it up. Let's start with a basic Am chord:
The left hand (L.H.) is easy, of course. Just finger the Am. With your right hand (R.H.), not counting your thumb, most people have four fingers. We're going to look at your thumb, your index finger, your middle finger, and your ring finger.
P.......Thumb........P = pulgar
I.........Index...........i = indice
M.......Middle........m = medio
A.........Ring..........a = anular
On the fretboard we are going to only look at four strings: the fifth, the fourth, the third, and the second strings. Of those four strings, we will call the 5th and the 2nd strings the "outside strings." Similarly, we will call the 4th and 3rd strings "inside strings." This fingerpicking pattern primarily alternates between plucking outside strings, then inside strings, then outside, then inside, etc. with a slight variation.
On the first count do a "pinch" with P and M by plucking the fifth string with your thumb (P), and simultaneously plucking the second string with your middle finger (M).
On the second count, drop your thumb (P) down to the fourth string and pluck it once with your thumb.
On the third count, pluck the third string with your index finger (I).
On the fourth count, pluck the fifth string with your thumb (P).
On the fifth count, pluck the second string with your midle finger (M).
On the sixth count, pluck the fourth string with your thumb (P).
On the seventh count, pluck the third string with your index finger (I).
On the eighth count, pluck the fifth string with your thumb (P). THEN repeat all eight counts, OR instead of going back to the pinch in the first count, just continue the pattern: 5th, 2nd, 4th 3rd, 5th, 2nd, 4th, 3rd, et cetera.
Count the eight counts as "One and two and three and four and." Repeat.
M P I P M P I P (repeat)
Try different chords for each series of 8 counts (four beats):
Hope this makes sense. A friend taught me this years ago, and I still use it quite often.